title: The vif gene of maedi-visna virus is essential for infectivity in vivo and in vitro.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D002831:Choroid Plexus / Q000166:cytology / Q000821:virology; D017353:Gene Deletion; D016346:Gene Products, vif / Q000235:genetics / Q000378:metabolism*; D020043:Genes, Essential; D008969:Molecular Sequence Data; D011021:Pneumonia, Progressive Interstitial, of Sheep / Q000503:physiopathology* / Q000821:virology; D012756:Sheep; D012757:Sheep Diseases / Q000821:virology; D014779:Virus Replication; D014790:Visna-maedi virus / Q000472:pathogenicity*
chemical_list: D016346:Gene Products, vif